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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 11 |
| 6 | 26 |
| 7 | 111 |
| 8 | 1111 |
| 9 | 11111 |
| 10 | 111111 |
| 11 | 1111111 |
| 12 | 11111111 |
| 13 | 111111111 |
[0,1,2,3,11,26,111,1111,11111,111111,1111111, 11111111,111111111] |